Grinding and polishing mill and means for feeding abrading or polishing mediums thereto.



. Patented Feb. I9, I90I. W. 0. BAILEY.

GRINDING AND POLISHING MILL AND MEANS FOR FEEDING ABBADING 0R POLISHING MEDIUMS TI'IEBETO.

' (Application filed Mar. 13 1900.) (No Model.)

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No. 668,552. Patentedfeb. l9, I90l.

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GRINDING AND POLISHING MILL AND MEANS FOR F EEDlNG ABRADING 0R POLISHING IIIEDIUNIS THERETD.

(Application filed. Max-{18, 1900.) (No Model.) 3 Sheets-Sheet 2.

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w. o. BAILEY. GRINDING AND POLISHING MILL AND MEANS FOR FEEDING ABRADING DB POLISHING MEDIUMS THERETD.

(Application filed u 18, 1900.)

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UNrTnn STATES PATENT Fries.

WILLIAM OLIVER BAILEY, OF LONDON, ENGLAND.

GRINDING AND POLISHING MILL AND MEANS FOR FEEDING ABRADING OR POLISHING MEDIUMS THERETO.

SPECIFICATION forming part of Letters Patent No. February 1901 Application filed March 13, 1900. Serial 1 lo.8|l- (No model.)

To all, whom it may concern.-

Be it known that I, WILLIAM OLIVER BAI- LEY, glass-merchant, silverer, and beveler, a subject of the Queen of Great Britain, residing at Excelsior Works, Wenlock road, City road, London,England, have invented certain new and useful Improvements in Grinding and Polishing Mills and in Means for Feeding the Abrading or Polishing Medium Thereto or to Analogous Mills, of which the following is a specification.

My invention relates to that class of mills or grinding-machines for which I have obtained a Patent No. 617,668, in which the grinding or polishing mediumsuch as sand, emery, rouge, or the like in solutionis fed to the grinding-face of the mill from a hopper or mixer by means of a rotary disk brush. Practice has proved that although an even feed is obtainable by such means, yet a large amount of waste of the medium occurs, a portion of the medium becoming thrown off the mill by centrifugal action before it reaches the work to be ground or polished.

The object of my present invention is to provide means whereby the medium may be fed to the mill with less waste, while still retaining the even flow across the grinding-face; also, to improve the grinding action of mills by the means to be hereinafter described.

In order that my said invention may be particularly described and ascertained, reference is hereby made to the accompanying drawings, in which similarletters of reference indicate corresponding parts.

Figure 1 is a front elevation of myimproved feeding arrangements. Fig. 2 is a sectional plan. Fig. 3 is a sectional end view of the mill. Fig. 4 is a section of ahorizontal mill. Fig. 5 is a plan of a modified form of ring with a corrugated inner face. Fig. 6 is a like view of a modified form of ring with its inner face ratchet-shaped. Fig. 7 is a similar view of a modified form of ring with its inner face elliptical. Fig. Sis a like view of a modified form of ring with its face formed in a series of segments or with two ellipses arranged at right angles to each other. Fig. 9 is a like view with the segments arranged eccentrically to form a ratchet. Fig. 10 is an enlarged perspective View of a portion of Fig. 9.

Referring to Figs. 1 to 4, a is the mill, b is the grinding-ring, and c is the hopper or mixer in which the medium in solution is agitated. The end of the hopper or mixer c is formed with a hole or slot d, which is fitted with a suitable valve d to control the exit of the medium solution. In front of the mixer c and the hole (Z therein, a trough or tubular conveyer e is fitted. In the drawings this is shown as bolted to the mixer and supported on the mill-axle; but any other convenient means of support may be adopted. The conveyer e is provided with a worm e, (or a spiral brush may be used,) attached to a worm-shaft e driven from any convenient source of power. In the drawings it is shown as geared with the mixer-shaft by bevel-gearing. The shaft 6 carries on its end a circular brush 6 which is fixed thereto, the end of the shaft being supported in the socket-bearing e", in which the mill-shaft a revolves. The tubular conveyor or trough is formed with a case 6 inclosing the annular brush 6 ,except for a suitable distance opposite the mill, where the brush projects through an opening in the case onto a metal or other disk f. This disk, Fig. 3, is arranged to fit the recess formed by the grinding-ring and is adjustably supported therein by bolts and springs f or by any other suitable means whereby the level of the disk may be adjusted to a position preferably slightly below the level of the ring I), as shown in Fig. 3.

Where the mill or grinder is used horizontally and inverted, as shown in Fig. 4, I suspend the disk f therein. The disk is of a smaller diameter than the internal diameter of the ring and is adjustably arranged above the level of the grinding-surface, as shown. In such cases the medium in solution is preferably fed through the hollow shaft (1, the medium falling onto the disk, upon which it travels or creeps by centrifugal action to the edge, where it falls or is thrown ofi close to the revolving grinder or mill.

Referring again to Figs. 1, 2, and 3, it will be seen that as the medium is ejected through the hole or slot 01 of the mixer it is conveyed to the brush 6 which transfers the medium onto the disk f in a regular manner. The

mill and disk revolving causes the medium to creep or travel spirally (by centrifugal action) towardand over the surface of the grinding-ring. In traveling or creeping the medium becomes more and more spread and evenly distributed and the layer, which (Where it is first applied to the disk from the brush) began co1n )aratively thick and uneven, flows over the grinding-faeeof the ring as a thin fine even film.

Figs. 5 to illustrate means for improving the grinding act-ion of the rings. This is effected by forming the ring with an irregularly-shaped inner edge or side, so as to catch up and induce the flow of the medium across its face and produce a cutting or grinding analogous to a shearing action. In Fig.

the inner edge or side of the ring is corrugated. In Fig. 6 it is ratchet-shaped, the

sharp corners being in some cases rounded off, asindicated by thedotted lines. In Fig. '7 it is elliptical. In Fig. 8 it is formed by four segments of circles or by two ellipses at right angles to each other. In Fig. 5) it is formed by segments arranged eccentrieally to form a long ratchet. In the latter case it may be desirable to incline the surface at (j, so that the edge g is slightly below the level of the ring, as shown in Fig. 10, which is an enlarged perspective view of a portion of Fig. 9. Any other irregular but balanced shape may be used with slightly varying success.

I claim-- 1. In agrinding and polishing mill, at grinding-ring, a disk suitably supported therein, and a Feeding mechanism for an abrading or polishing medium arranged in suitable relation to the said disk.

2. I11 a grinding and polishing mill, a grinding-ring having its inner face formed eccentrically, a disk mounted therein, and means for suitably feeding an abrading and polishing medium thereto.

In agrindingand polishing mill, the combination with the grinding-ring provided with a recess, of a disk mounted in said recess and suitably connected to said ring, a rotary brush arranged in suitable relation to said disk, and a conveyer for the abrading and polishing medium connected to the said brush.

l-. In agrindingand polishing mill, the combination with the grinding-ring provided with a recess, of a disk mounted in said recess, means for adjustably connecting the disk to said ring, a rotary brush mounted in suitable relation to said disk, and a conveyer for the abrading and polishing material connected to said brush.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witncsses.

WILLIAM OLIVER BAILEY.

\Vituesses:

GEORGE C. DOWNING, \VALTER J. SKERTEN. 

